A winter storm warning will be in effect for southern New Hampshire beginning Friday afternoon, while a blizzard warning was announced for coastal New Hampshire.

Clouds will thicken Thursday night, with some light snow showers possible after midnight as a system in the northern branch of the jet stream moves in. A developing southern wave will be the one to watch closely on Friday. This system will take over, becoming a strong nor'easter.

There is a very good chance of heavy snowfall in central and southern New Hampshire with 1-2 feet of snow possible, with isolated locations seeing 30 inches or more.

Lesser amounts (6 to 12 inches) appear likely in northern New Hampshire, assuming the track as it stands now holds true. Even if the storm slides 50 miles farther south, it may only be a 4- to 8-inch snowfall in central and northern Coos County.

Gusty winds will become a factor as well, late Friday into Saturday. This wind may result in power outages in southeastern New Hampshire and blowing and drifting snow in many areas.

Blizzard conditions in southeastern New Hampshire cannot be ruled out late Friday through Saturday morning. In any event, a heavy amount of light, fluffy snow is likely, but specific amounts region by region are not quite clear yet, as the storm has not even formed into the nor'easter yet.

For those living along the Seacoast, there is a chance of coastal flooding at the time of a high astronomical tide late Saturday morning through midday.

Any moderate to heavy snow Saturday morning will taper off during the afternoon, with clearing at night.

The snow will be fluffy in most areas, except right at the coast, where it will be slightly heavier and wetter.

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